To get Strong Acid in Subnautica 2 you'll need a Processor, as it's a resource that can't be made in your basic fabricator. Mild acid is an early recipe, found in your fabricator, but the strong acid needed to make fiber mesh, an ingredient in the Rebreather blueprint, requires a little more work. So once you unlock the Rebreather recipe - or even before - you should look into adding this valuable contraption to your base.
While this survival game sequel gives you a little more help than its predecessor ever did, there's also a lot more to Subnautica 2, and you'll find yourself building a base and new machinery, like the Processor far earlier.Here are the details.
How to make strong acid in Subnautica 2
To make strong acid in Subnautica 2, you first need to build a Processor in your base, and ensure it's powered. Then, you'll need to place two Necrolei Cysts into that Processor to produce one bottle of strong acid.
To make the Rebreather, which is the main early game blueprint that requires the acid, you're going to need two bottles, so be sure to collect four Subnautica 2 Necrolei Cysts when you find them.
I'd also recommend picking up as many Cysts as you can, as you'll find loads of later game recipes require Strong Acid, but you'll be nowhere near the Necrolei Cyst location.
You'll have to tread some dangerous waters to find these resources, as well as the Rebreather blueprint itself, so make sure you're prepared as much as possible. In the meantime, be sure you know where you find some other tricky resources, including Subnautica 2 silver, Lucifer Rotsacs, and Fibrous Pulp, the latter of which you'll need to combine with strong acid to make fiber mesh.
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